@article{02177869,
title = {Products of conjugacy classes in perfect linear groups. Extended covering number.},
journal = {Zapiski Nauchnykh Seminarov POMI},
volume = {321},
year = {2005},
pages = {67-89},
doi = {10.1007/s10958-006-0207-6},
zbl = {1088.20024},
language = {en},
url = {http://dml.mathdoc.fr/item/02177869}
}
Gordeev, N.L. Products of conjugacy classes in perfect linear groups. Extended covering number.. Zapiski Nauchnykh Seminarov POMI, Tome 321 (2005) pp. 67-89. doi : 10.1007/s10958-006-0207-6. http://gdmltest.u-ga.fr/item/02177869/